<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body>
        <p id="demo"></p>
        <script>
            var w = window.innerWidth
                    || document.documentElement.clientWidth
                    || document.body.clientWidth;
            var h = window.innerHeight
                    || document.documentElement.clientHeight
                    || document.body.clientHeight;
            x = document.getElementById("demo");
            x.innerHTML = "浏览器的内部窗口宽度：" + w + "，高度：" + h + "。";
        </script>
    </body>
</html>
